[Pkg-systemd-maintainers] Bug#741469: cups-daemon: postinst fails to generate working cupsd-systemd-listen.conf when only using unix socket

[Didier 'OdyX' Raboud]

Hi Michael,

Le samedi, 15 mars 2014, 19.04:08 Michael Stapelberg a écrit :
> Didier 'OdyX' Raboud <odyx at debian.org> writes:
> > Le jeudi, 13 mars 2014, 19.13:28 Michael Biebl a écrit :
> >> Apparently, "unsetting" ListenDatagram= makes systemd believe, that
> >> there is no valid Listen directive anymore for the socket, even
> >> though Corsac has specified
> >> ListenStream=/var/run/cups/cups.sock
> >> 
> >> The error message I'm getting is
> >> 
> >> Mär 13 19:08:18 pluto systemd[1]: cups.socket lacks Listen setting.
> >> Refusing.
> >> 
> >> Sounds like a genuine bug in systemd.
> 
> Actually, I don’t think it’s a bug. Quotang systemd.socket(5):
> 
>     If the empty string is assigned to any of these options, the list
> of addresses to listen on is reset, all prior uses of any of these
> options will have no effect.
> 
> So, this is working as intended (specifying ListenDatagram=
> effectively unsets Listen*), and the correct way to specify what
> Yves-Alexis wanted to do is just:
> 
>     [Socket]
>     ListenStream=
>     ListenStream=/var/run/cups/cups.sock

Well. Although that's what the manpage says, I think it's quite strong 
for systemd to refuse to finish the socket reloading because of that 
unclarity, and I tend to think that doing so is still a bug.

Cheers,
OdyX